Sand-blast apparatus



March 30-, 1926. 1,578,862

7 J. H. STALE Y SAND BLAST APPARATUS Filed April 9, 1924 Patented Mar. 30, 1926.

UNITED ,srarss ATENT OFFICE. I

JOSEPH H. STA LEY, OF COLUMBUS, INDIANA.

' snn n nnasr APPARATUS.

I Application filed April 9, ieaaseria No. 765,174.

To all whom it may concern:

Be it known that I, JOSEPH H. STALEY, a citizen of the United States, residing at Columbus, in the county of Bartholomew and State of Indiana, have invented new and useful Improvements in Sand-Blast Apparatus, of which the following is a specification. i

This invention relates to improvements in apparatus for forcibly discharging sand for etching, cleaning and scouring purposes, for discharging fluids for surface coating and spraying, and generally for moving substances comprised of loosely adherent particles.

-The object of the invention'i's to pro-.

vide means bywhich the mixture of air may be regulated to the character of the substances to be moved by it-in order that clogging the apparatus might be prevented and to regulate the speed of the discharge and the force of impact with which the substance is thrown.

- which will hereinafter appear, by the mechanism diagrammatically illustrated in the accompanying drawings, in which Fig. 1, shows a discharge nozzle in longitudinal section, connected with a tank containing compressed air, by a pipe having a control valve and also having a mixer through which sand or other material to be discharged at the nozzle is drawn into the air flow through the pipe and also having an auxiliary air-pipe supplying air under pressure from the tank to the nozzle, with control valves located in said auxiliary pipe. Fig. 2, is a view in elevation and partial longitudinal section of themixer. Fig. 3,

is a view similar to Fig. 1 with-the auxiliary air-pipe omitted, andFig. 4, is a longitudinal sectional view of a suction nozzle to be substltuted in place of the nozzle shown in Figs. 1 and 8. Fig. 5, 1s a modification of the nozzle shown in 4-, connecting it with a-mlxer by a flexible hose as in Flg. 1. Like characters 'of reference lndlcate like parts in the several views of: the drawing.

The tank 1, is of any usual and suitable constructlon'filled with compressed air by any approved means, not shown. Leading from. it isa pipe 2, having the control valve '3, anddischarging into a flexible hose 4,

The flexible hose 1 is attached to the end a of a rig d member 5 which'terminates at its outer end with a nozzle 6, (see Fig. 2).

The member 5 is supported by anysuitable means, here shown as by 'a standard 7 mounted on a portable base 8. The nozzle,

end of member 5 discharges into the end of a much larger'member 9, also lsuitablysupported, here shown by a standard '10 mounted on the base 8. The two members com prise a mixer and are preferably adjustable longitudinally in their standards to vary the position ofmember 5 relative to the member 9 and any given adjustment of the members in theirstandards is retained by.

set-screws 11. These mixer members may be suitably-shaped and positioned parts of a one plece casting.

A flexible hose 12 isattached at one end to the outer end of the. member 9, and at its other end with a rigid pipe 13 which discharges into the side of a nozzle 14:.

A branch of pipe 2 has a control valve 15 and said branch is connected by a flexible hose 16 with the inner end of the nozzle 14, andfor the convenience of the operator at the nozzle,va valve 17 is preferably located on that end of the nozzle into which hose 16 discharges. A

In the operation of my apparatus, the sand, paint, or other material 20, to be discharged, is contained in a tank 21, or the 7 like, when a container is necessary .to hold it, and the mixer members 5 and 9. in suitable adjustment relative to each other re tained by standards 7 and 10 andbase' 8, are submerged in the, "material 20. Y The valve 3 is'opened and material 20 mixedwith air, is drawn into member 9 and dis charged through hose "12 and nozzle 14:. The discharge through the nozzleis ac- I celerated by opening valves 15 and 17." A

maximum opening is obtained at valve 15.

and adjustments-of air discharge through hose 16 under that are conveniently made at the nozzle with valve 17. Anywhere that the open end of member 9 is submerged in the material 20 Will cause the material to enter the member, partly by gravity and partly by suction, where it is mixed With air coming under pressure through hose 4 and is forced through hose 12 and out through nozzle 14. This, under many con ditions of use, is sufiicient .Without the aid of additional pressure coming through the auxiliary hose 16, and the latter, therefore, is discarded as illustrated in the equipment shown in Fig. 3.

The nozzle shoWn in Fig. 4, differs from that shown in Fig. 1, in that compressed air coming through hose 16 is discharged through a nozzle 18 into the inner end of nozzle l and a suction is created to aid in drawing the material through hose lQl, into-the nozzle, and a blast is retained to positively drive it out. w

The modification shown in Fig. 5, adapts the nozzle of Figd to the structure of Fig. 1. It Will be apparent that when the valve 17 is turned off the operation of the ap paratus ceases.

The apparatus is illustrated diagrammatically to make its construction easily understood but in practice it may be variously modified to suit conditions of manufacture and use, some of Which have been here illustrated and described, Without departing from the spirit of the invention and I therefore do not desire to be limited to any precise forms more than is required by the appended claims.

1. In a device. for the purposes specified, a pipe open at one end, a nozzle, and.

means for maintaining the nozzle in aligned relationship With the pipe such as to leave a substantially unobstructed space for the entrance to the pipe from all directions 01" loose surrounding material.

2. In a device for the purposes specified, a pipe open at one end, a nozzle, means comprising supporting bearings and a connecting member, such that a substantially unobstructed space for the entranceof loose surrounding material from all directions is provided into the pipe.

Signed at Columbus, Indiana, this the 'Tth'day of April 1924.

JOSEPH H. STALEY. 

